Search Postgresql Archives

Call pstrdup() of palloc.h will change source string, please help!

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello,

I'm working on modifying an postgresql extension called "cstore_fdw". My function is like:

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
static bool
ParsePeriod(const char *periodString, Period *result)
{
    bool isSuccess = true;
    char *dupPeriodForString;
   
    char delimiters[3][2] = { "(", ",", ")" };
    char **results[3] = {&(result->periodName), &(result->start_column_name), &(result->end_column_name)};
   
dupPeriodForString = pstrdup(periodString); // !!!! pstrdup error !!!!

    if (dupPeriodForString == NULL || strlen(dupPeriodForString) <= 0 || result == NULL)
    {
        isSuccess = false;
    }
   

    for (int i = 0; i < 3; ++i)
    {
        char *token = NULL;
        Size len = 0;
        int j;
        if ( (token = strsep(&dupPeriodForString, delimiters[i])) == NULL )
        {
            isSuccess = false;
            break;
        }
       
        // trim
        len = strlen(token);
        while(isspace(token[len - 1])) --len;
        while(*token && isspace(*token)) ++token, --len;
        token = pnstrdup(token, len);

        // lowercase
        len = strlen(token);
        for (j = 0; j < len; j++)
        {
            token[j] = tolower(token[j]);
        }

        *results[i] = token;
    }
   
    return isSuccess;
}
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

pstrdup() will change source "system_time( stt , ett )" to "system_time( stt " and return "system_time( stt " when it is called in ValidateForeignTableOptions() and CStoreGetOptions(). But if I call it in somewhere else, it won't get wrong.

Here's my enviornment:
postgresql: psql (PostgreSQL) 12.10 (Ubuntu 12.10-0ubuntu0.20.04.1)
compiler: clang version 10.0.0-4ubuntu1
OS: WINDOWS sub linux GNU/Linux 5.10.102.1-microsoft-standard-WSL2 x86_64

How can I do to fix this problem?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]

  Powered by Linux